How to Create Mobile Navigation like the new Air Theme

There are several steps involved to accomplish this. The solution was tested on a couple of Builder Child themes, but not all, so this may not work for all Child themes. As such, these instructions are provided "as is" and are unsupported. Further customisation is beyond the scope of our theme support.

Pre-requisites

Builder parent theme AND your Builder child theme should be at least at version 4, since these are responsive capable themes.

Responsive needs to be enabled in the child theme (functions.php should contain: add_theme_support( 'builder-responsive' );

Include the javascript code that enables the Mobile dropdown

Copy the js folder and contents from the Air child theme to your child theme.

Add the following code at the end of your child theme's functions.php file, yet before the closing ?> (if any):